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Intro
This is an IEM that caught Head-fi by storm. Featuring a single 10mm high-bandwidth dynamic, using two patented technologies, Ostry made quite the statement. A company that was otherwise unknown before, actually had quite the experience in creating drivers [over 20 years!], likely for other companies as an OEM. They finally decided to release their own products and while...” --Inks

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[I do not have trained ears, nor do I have a great setup. Hopefully I use the right words to describe the sound]
Even with the sibilance I love listening to them more than my SoundMagic E10 and my Alessandro MS2 (Grado 325is). The E10s are pretty good, but they somehow lack the fullness that makes listening satisfying. The XBF400Pro delivers just that. They produce rich and...” --drakool